cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A200839 Number of 0..n arrays x(0..3) of 4 elements without any two consecutive increases or two consecutive decreases.

Table of values

n a(n)
1 16
2 69
3 194
4 435
5 846
6 1491
7 2444
8 3789
9 5620
10 8041
11 11166
12 15119
13 20034
14 26055
15 33336
16 42041
17 52344
18 64429
19 78490
20 94731
21 113366
22 134619
23 158724
24 185925
25 216476
26 250641
27 288694
28 330919
29 377610
30 429071
31 485616
32 547569
33 615264
34 689045
35 769266

List of values

[16, 69, 194, 435, 846, 1491, 2444, 3789, 5620, 8041, 11166, 15119, 20034, 26055, 33336, 42041, 52344, 64429, 78490, 94731, 113366, 134619, 158724, 185925, 216476, 250641, 288694, 330919, 377610, 429071, 485616, 547569, 615264, 689045, 769266]